Class 8 Coal And Petroleum CBSE Questions & Answers

Class 8 · Coal And Petroleum

This is Science Class 8 Coal and Petroleum CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Coal is produced inside the earth millions of year ago by :
  • A
    anaerobic thermal degradation of cellulosic material
    Correct
  • B
    aerobic thermal degradation of cellulosic material
  • C
    anaerobic fractional distillation of wood
  • D
    aerobic destructive distillation of wood
2
The destructive distillation of coal gives many useful products in the :
  • A
    presence of oxygen
  • B
    presence of carbon dioxide
  • C
    absence of carbon dioxide
  • D
    absence of oxygen
    Correct
3
CO is produced on :
  • A
    incomplete combustion of coal
    Correct
  • B
    fractional distillation of petroleum
  • C
    distillation of water
  • D
    complete combustion of coal
4
Peat is most inferior quality or variety of coal because :
  • A
    light brown colour
  • B
    maximum carbon content
  • C
    minimum carbon content
    Correct
  • D
    no smoke while burning
5
During fractional distillation of crude oil the hydrocarbons that condense first are those with :
  • A
    heaviest or most dense
  • B
    highest boiling point
    Correct
  • C
    lightest in weight or least dense
  • D
    lowest boiling point
6
Petroleum is a mixture of :
  • A
    carbon and hydrogen
  • B
    oxygen, sulphur and carbon
  • C
    hydrocarbons
    Correct
  • D
    oxygen and nitrogen
7
Coal is regarded as backbone of our national economy because :
  • A
    supports industries by providing raw material in its different forms
  • B
    indirectly supports many industries and thermal power plants
    Correct
  • C
    is exported on large scale since our country has maximum reserves
  • D
    supports our agriculture and crop production as manure
8
The given image shows :
Question 8 figure 1
  • A
    anthracite
    Correct
  • B
    lignite
  • C
    haematite
  • D
    bituminous
9
The image shows a cheaper fuel with high calorific value it is :
Question 9 figure 1
  • A
    light coke
  • B
    bituminous coke
  • C
    petroleum peat
  • D
    petroleum coke
    Correct
10
Lead added to petrol engines works as :
  • A
    anti knock agent
    Correct
  • B
    agent to increase combustion rate
  • C
    accelerant
  • D
    stimulant
11
The image shows a common binder in road construction it is :
Question 11 figure 1
  • A
    betumen
  • B
    bitumen
    Correct
  • C
    bituman
  • D
    betuman
12
The following image shows :
Question 12 figure 1
  • A
    solidified lubricating oil
  • B
    sponge
  • C
    white coke
  • D
    paraffin wax
    Correct
13
_____ becomes coal when it is been buried long and deep enough :
  • A
    bituminous
  • B
    lignite
  • C
    peat
    Correct
  • D
    anthracite
14
Read the following statements :i) Diesel is also known as gasoline.ii) Diesel is used as a solvent for dry cleaning.
  • A
    both are wrong
    Correct
  • B
    statement i) is correct but ii) is wrong
  • C
    statement ii) is correct but i) is wrong
  • D
    both are correct
15
Match the following :i) Petroleum gas…………….a) cattle dungii) Coke………………………b) domestic fueliii) Coal gas………………….c) conversion of wood to carboniv) Biogas……………………d) used in metal extractionv) Carbonisation……………e) an industrial fuel
  • A
    i.b,ii.d,iii.e, iv.a, v.c
    Correct
  • B
    i.d,ii.b,iii.e, iv.c, v.a
  • C
    i.d,ii.a,iii.b, iv.e, v.c
  • D
    i.c,ii.e,iii.d, iv.a, v.b